很长时间没用仿真了，以前用的好好的，最近突然打不开打开以前的案例了
报错如下：
rviz的
Got keys from plugin meta data ("xcb")
loaded library "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so"
qt.qpa.xcb: could not connect to display
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb.
[rviz-2] process has died [pid 39282, exit code -6, cmd /opt/ros/noetic/lib/rviz/rviz -d /home/xzk/demo05_ws/src/urdf01_rviz/config/show_mycar.rviz __name:=rviz __log:=/home/xzk/.ros/log/8be6cf38-8819-11ec-ae80-91d8f05102de/rviz-2.log].
log file: /home/xzk/.ros/log/8be6cf38-8819-11ec-ae80-91d8f05102de/rviz-2*.lo
gazebo的
process[gazebo_gui-3]: started with pid [40780]
process[model-4]: started with pid [40784]
[ INFO] [1644240650.479948627]: Finished loading Gazebo ROS API Plugin.
[ INFO] [1644240650.496169118]: waitForService: Service [/gazebo/set_physics_properties] has not been advertised, waiting...
[ INFO] [1644240650.622187021]: Finished loading Gazebo ROS API Plugin.
[ INFO] [1644240650.623285983]: waitForService: Service [/gazebo_gui/set_physics_properties] has not been advertised, waiting...
Aborted (core dumped)
[gazebo_gui-3] process has died [pid 40780, exit code 134, cmd /opt/ros/noetic/lib/gazebo_ros/gzclient __name:=gazebo_gui __log:=/home/xzk/.ros/log/237706c4-881a-11ec-ae80-91d8f05102de/gazebo_gui-3.log].
log file: /home/xzk/.ros/log/237706c4-881a-11ec-ae80-91d8f05102de/gazebo_gui-3*.log
急！
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